ol_ltp.h

arm音频编解码库

/*
********************************************************************************
*
*      GSM AMR-NB speech codec   R98   Version 7.6.0   December 12, 2001
*                                R99   Version 3.3.0                
*                                REL-4 Version 4.1.0                
*
********************************************************************************
*
*      File             : ol_ltp.h
*      Purpose          : Compute the open loop pitch lag.
*
********************************************************************************
*/
#ifndef ol_ltp_h
#define ol_ltp_h "$Id $"
 
/*
********************************************************************************
*                         INCLUDE FILES
********************************************************************************
*/
#include "typedef.h"
#include "mode.h"
#include "p_ol_wgh.h"

/*
********************************************************************************
*                         DECLARATION OF PROTOTYPES
********************************************************************************
*/
int ol_ltp(
    pitchOLWghtState *st, /* i/o : State struct                            */
    vadState *vadSt,      /* i/o : VAD state struct                        */
    enum Mode mode,       /* i   : coder mode                              */
    Word16 wsp[],         /* i   : signal used to compute the OL pitch, Q0 */
                          /*       uses signal[-pit_max] to signal[-1]     */
    Word16 *T_op,         /* o   : open loop pitch lag,                 Q0 */
    Word16 old_lags[],    /* i   : history with old stored Cl lags         */
    Word16 ol_gain_flg[], /* i   : OL gain flag                            */
    Word16 idx,           /* i   : index                                   */
    Flag dtx              /* i   : dtx flag; use dtx=1, do not use dtx=0   */
);
#endif